well, besides the russia trip that tamerlan made last year. and i think that there's undoubtedly already been conversations and cooperation under way between russia and the united states to try to flesh out exactly what he did there and who he met with. but there's a broad international cooperation, that's what has distinguished us before 9/11 and after 9/11, so i'm confident the intelligence community has been touching all bases relevant to the threat of terrorism around the world to see if there's anything there, connections, you know, through the internet, connections, you know, through people that might have had contact with him as mike leiter was saying, as we pull threads based on, you know, the digital signatures that, you know, come out of this investigation, all of those will be exploited by the intelligence community. >> all right, p.j. crowley, i think you're going to stick with us for our next hour. >> sure. >>> but we'll take a quick break and be back with more on the investigation with nbc pete williams and roger cressey. zb÷a s